Candidate's Examination No . . . . . . . . . . . . . . . . . . . . . . . 

PRESIDENT’S OFFICE REGIONAL ADMNINSTRATION AND LOCAL GOVERNMENT

LUDEWA DISTRICT COUNCIL

FORM TWO DISTRICT MOCK EXAMINATION 2022

031 PHYSICS

TIME: 02:30HOURS Friday Morning, June 10th, 2022 a.m.

INSTRUCTIONS.

1. This paper consists of sections A, B and C with a total of 10 questions.

2. Answer ALL questions from both sections.

3. All communication devices, calculators and any unauthorized materials are not allowed in the examination room.

4. All writing must be in blue or black ink EXCEPT drawings which must be in pencil.

5. Remember to write your candidate number on both pages at right hand corner of every page.

6. The following constants may be used.

• Density of water= 1g/cm3 or 1000kg/m3.
• Gravitational field strength, g = 10N/kg

SECTION A (15 marks)

Answer all question from this section.

1. For each of the items (i) – (x), choose the correct answer from among the given alternatives and write its letter beside the item number in the answer booklet provided.

(i) Physics subject is very wide to understand it as a whole. Due to that situation, scientists have decided to break it down into several concepts for simplicity of understanding and mastering. As a student who is interested in physics, what is a correct set of concepts for the reasons above?

1. Agrobusiness, mechanics and molecules
2. Heat, optics, mechanics and electricity.
3. Biophysics, chemophysics, geophysics and astrophysics
4. Wave, physics of the atom and radionuclide.

(ii) In one of the following areas, quantitative measurement knowledge plays an important role except.

1. In hospital
2. In agriculture
3. In schools
4. In smell testing

(iii) A physics teacher asked the students to explain briefly things which may cause fire in the physics laboratory. The students tried to answer but some explanations were not correct. Identify the explanations which were not correct.

1. Electrical faults
2. Presence of flammable materials
3. Carelessness in using gas lighter and match boxes
4. The colour of some chemicals supports combustion

(iv) A cooking oil was mixed with water and poured into a measuring cylinder and allowed to settle for three minutes, which one will be the observed phenomenon?

1. Cooking oil floats over water
2. Meniscus of water appeared convex in shape at the surface
3. Water floating on the oil.
4. Water and oil completely mixed up.

(v) If two cars are both travelling at 50Km/h and they collide head on, the effect is similar to a car colliding with a wall at what velocity?

1. 0 km/h
2. 10 km/h
3. 50 km/h
4. 100 km/h

(vi) Thermometer is a device that determine the measure of the kinetic energy that particles of an object possess. Part of a thermometer which prevents mercury from flowing back when temperature falls:

1. Stem
2. Constriction
3. Bulb
4. Neck

(vii) When a large body of experimental evidences support or does not support the hypothesis, what may the hypothesis eventually be considered?

1. Observation
2. Insight
3. Conclusion
4. Law

(viii) A house building contractor fitted window glass panes which someone cannot see through, but the rooms are fully illuminated with light. These types of glass pane materials are said to be:

1. Dim 
2. Opaque 
3. Translucent 
4. Transparent

(ix) The following is a reason why objects in air tend to fall at the same time when they are released from the same height h above the ground level; -

1. They have the same weight
2. There is usually no resistance in the air
3. Acceleration due gravity is the same
4. None of the above

(x) The substance which is lighter has low density and less affected by gravitational force. In comparison with water, the number of times a substance is denser than water is termed as?

1. Density
2. Relative density
3. Volume
4. Mass

ANSWERS

2. Match the items from LIST A with the corresponding responses in LIST B by writing its letter in the box provided.

ANSWERS

SECTION B (60 Marks)

Answer ALL questions from this section.

3. (a) When water and mercury were in two separate measuring cylinders, the teacher asked student to observe the reading in both cylinders. Why does mercury form downward meniscus while that of water forms upward meniscus?

(b) A force of 4 N causes a certain copper wire to extend to 1.0 mm. Find the load that will cause a 3.2 mm extension on the same wire.

4. (a) A student from school a certain school immersed the test tube into a liquid and found it is floating vertically upright. Why a test tube does so?

(b) The diagram below shows on form of man hydrometer used to measure the densities of liquid over the range of 0.8 to 1.0 g/cm3. If the area of cross section of the stem is 0.5 cm2 and the distance between the 0.80 and 100 division is 18cm.

What is the volume of hydrometer below 1.0 graduated mark?

5. (a) (i) Most of us confuses and sometimes misuse the term Energy and power that they mean the same. As a competent student give the difference.

(ii) The ball rebounds to the height less than the original height. Explain briefly why does this happen.

(b) A teacher was demonstrating the motion of the stone of mass 2 kg as it moves vertically upward but he then released it from height of 2m above the ground.

(i) How much of the potential energy at height of 0.5m does the stone possess?

(ii) Determine its kinetic energy at height of 0.5m.

6. (a) In verifying ohms law, the experiment was conducted in a place with variation of physical factors. Describe four (04) factors that affects the flow of current in the circuit?

(b) The circuit diagram below that shows the current through the 6 Ω resistor is 2.5 A.

(i) What is the magnitude of the voltage from the power supply?

(ii) Determine the current through the 8 Ω resistor.

7. (a) (i) When the pulling force is applied to the handle of the door, the hinge acts as the axis of rotation, and the door turns about. What do you understand by the term turning effect?

(ii) When forces are in equilibrium, it means that there is no net force to cause any movement. Describe conditions for parallel forces to be in equilibrium.

(b) A heavy uniform metal beam AB weighting 500kg is supported at its ends. The beam carries a weight of 3000kg at a distance of 1.5m from end A. If the beam is 4m long, determine the thrusts on the supports A and B.

8. (a) (i) During the class session, the teacher introduced the lesson that is ‘Simple Machine’. What do you understand that term?

(ii) Draw a diagram of a single – string pulley system with a velocity ratio of 4

(b) The electric motor of a crane uses 42 000 J of electric energy lifting a pack of eight bags of cement of 25 kg each through a distance of 15 m from the ground to the fourth floor. Calculate the efficiency of the motor during the lifting process

9. (a) When the metal can that containing hot water is closed, and the cold water is poured on it, the can collapses. Why?

(b) In an experiment using Hare’s apparatus, the lengths of methanol and water columns were found to be 16 cm and 12.8 cm respectively

(i) What is the relative density of methanol?

(ii) If the length of methanol column was altered to 21.5 cm what would be the new height of the water column?

SECTION C (15 MARKS)

10. (a) A form two student is in the physics laboratory. He is provided with density bottle, sand, digital balance and water. He is required to determine the density of sand using the instruments provided above, show how will he determine the density of the sand?

(b) In an experiment to determine the density of sand, Sophia obtained and recorded the following results.

Mass of the density bottle, M1 = 200g

Mass of density bottle and sand, M2 = 490g

Mass of density bottle, sand and water, M3 = 550g

Mass of density bottle and water, M4 = 300g

(i) What was the density of sand?

(ii) Determine the relative density of sand.

THE PRESIDENT’S OFFICE REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

MOSHI MUNICIPAL COUNCIL

SECONDARY EDUCATION EXAMINATIONS SYNDICATE

031 PHYSICS

FORM TWO MOCK EXAMINATION 

Friday 01^st July 2022 Time: 2:30Hours 

INSTRUCTIONS: 

1) This paper consists of sections A, B and C.

2) Answer all questions.

3) All drawings should be in pencil and writing in blue or black pen.

4) Write your names or number on the top right-hand corner of every page.

5) Cell phones and calculators are not allowed in the examination room.

6) Whenever necessary, use the following constants:

• Density of water = 1000kg/m³ or 1g/cm³ • Acceleration due to gravity, g = 10m/s² or 10N/Kg.

SECTION A (30 MARKS)

Answer all questions from this section.

1. For each of the following items (i) – (xx) choose the correct answer among the given alternatives and write its letter beside the item number.

i. An engineer wanted to measure the diameter of a wire to the nearest 0.001cm. which of the following instruments will be used?

1. Metre rule
2. Measuring cylinder
3. Micrometer screw gauge
4. Vernier caliper 
5. Engineer caliper

ii. Which phenomenon explain ability of some small insects to walk over a water surface?

1. Capillarity
2. Adhesion
3. Surface Tension
4. Osmosis

iii. The branch of science in which the relationship between matter and energy is studied is referred to:

1. Biology
2. Chemistry
3. Physics
4. Agricultural science
5. Geography

iv. Which of the following instruments work under the Pascal’s principle of pressure transmission

1. Spring balance
2. Single fixed pulley
3. Inclined plane
4. Hydraulic press

v. The process whereby materials recover the original length after removing the load or force is described as.

1. Plasticity
2. Deformation
3. Elasticity
4. Elastic limit

vi. The term used to describes the ability of an object to float on a surface of liquid is classify as:

1. Floatation
2. Buoyancy
3. Density
4. Pressure

vii) The quantity obtained by taking the ratio of mass per unit volume of a substance is described as:

1. Relative density
2. Density
3. Matter
4. Volume

vii. Which of the following is the process used to descried the action of movement of solvent molecules from high to low concentration through a semi-permeable membrane?

1. Fusion
2. Osmosis
3. Pressure
4. Diffusion

viii. Materials can be twisted into different shapes. Which among the following forces causes twisting of elastic materials?

1. Restoring force
2. Compressional force
3. Stretching force
4. Torsional force

ix. What is the name given to a material which has ability of attracting some other materials?

1. North pole
2. Electromagnet
3. Magnet
4. Marble stone

x. How does depth affect the pressure in liquids

1. Pressure is inversely proportional to depth
2. Pressure is equal to depth
3. Pressure is not equal to depth
4. Pressure is directly proportional to depth 

xi. What among of the following term is used to explain the tendency of a liquid to rise or fall in a narrow tube?

1. Diffusion
2. Capillarity
3. Adhesion 
4. Cohesion

xii. A machine with effort between load and fulcrum belong to which class of lever?

1. First class lever
2. Third class lever
3. Second class lever
4. Fourth class lever

xiii. Which of the following are correct information about the particles on solid state of matter .

1. Are far apart, vibrating and randomly in motion
2. Are closely together, weak force of attraction and stationary
3. Are closely together, vibrating and strong force of attraction.
4. Are slightly far apart, moving randomly and weak force of attraction

xiv. The materials which do not completely allow the light to pass through

1. Transparent
2. Translucent
3. Luminous
4. Opaque 

xv. What happened behind an opaque object when a beam of light falls on it?

1. Umbra
2. Shadow
3. Penumbra
4. Beam

xvi. Form two students asked to identify the presence of charge on an Object which among of the instrument should they use ?

1. Capacitor
2. Resistor
3. Electroscope
4. Gold leaf electroscope

xvii. A resistor of 6Ω connected with 24mv battery. What will be the current in Ampere?

1. 0.004A
2. 40A
3. 12A
4. 4A

xviii. Why it is possible for a bus loaded on top carrier to skid when changing direction at high speed?

1. Because its centre of gravity is at lower position
2. Because its centre of gravity is at centre
3. Because its centre of gravity is at higher position
4. Because it is very stable

xix. What criterion supports that single fixed pulley is a machine

1. Used to lift heavy loads short distance
2. Used to lift light loads to inaccessible point
3. Effort used is less than load
4. Effort used is greater than load 

xx. Which among of the following machine work under the atmospheric pressure principle?

1. Hydraulic brake system
2. Screw Jack
3. A siphon
4. Pressing machine

2. Match the description of electric terms in list A with the correct electric terms in list B by writing a letter of the correct response below the corresponding item number in the table provided

3. Complete each of the following statements by writing the correct answer on the space provided

i. A tendency of an object to fall to the lower level in fluid is called

…………………………

ii. An upward force exerted on object when it is totally or partially immersed in fluid is known as ……………………

iii. A product of force and perpendicular distance is known as …………………………

iv. A percentage ration of work out put to work input is known as

…………………………

v. An effort of 50N used to operate a machine to lift up a load of 150N the mechanical advantage ( M.A) of the machine is …………………… 

SECTION B (40 Marks)

4. a) state laws of reflection

b) Explain the behavior of light when it encounters translucent, transparent and opaque materials

c) Calculate number of images when the angle between two plane mirrors is: i. 60⁰ ii. 0⁰

d) How the number of images formed by plane mirrors related to the angle between two plane mirrors?

5. a) State conditions for a body to be in equilibrium.

(b)By using the principle of Moment determine unknown Weight (W) on the fig below.

(c)A machine having velocity ratio (V.R) of 5 need an effort of 240N to raise a load of 720N. How much 

i. mechanical advantage

ii. Efficiency (e)

6. a)i. Differentiate Distance from displacement.

ii. Write down three equations of linear motion

b) A paratrooper falling under gravity after 6 seconds, 

i. what will be the maximum height covered?

ii. What will be its velocity when hitting the ground?

7. a) Kinetic energy potential energy are forms of mechanical energy. Give comparison and differences between them

b) A car of mass 4tones travels at velocity of 4m/s .How much kinetic energy developed?

c) How much power developed when a crane lifts a container of mass 500kg through a height of 5m in 10sec ?

SECTION C (30 Marks)

8. a) By using a concept of pressure explain why a tractor is designed with wide tires?

b) A rectangular block weighting 320N has dimensions of 4m x 2mx 10m. What is the greater pressure and least pressure it can be exerted on the ground?

(c). Explain why the wall of the dam is made much thicker at the bottom than at the top?

d) What is usefulness of atmospheric pressure in real life situation? (Any three)

9. a) state Newton’s laws of motion

b) i. Give reason why a person doing high jump bend a little his legs on landing ii. Why it’s necessary to use seat belt in a car?

c) A tennis ball whose mass is 150 g is moving at a speed of 20 m/s. it is then brought to rest by one player in 0.05 s. find average force applied

10.a) Explain why efficiency of machines is always less than 100%?

b) An object weight in air is 6.0N and 4.0N when immersed in water. What will be its:

i. Up thrust in water

ii. Relative density

iii.Density

c) Give reason why a ship can move on surface of water without sinking?